t/annotate-tests.sh: avoid passing a non-newline terminated file to sed Some versions of sed exit non-zero if the file they are supplied is not newline terminated. Solaris's /usr/xpg4/bin/sed is one such sed. So rework this test to avoid doing so. This affects tests t8001-annotate.sh and t8002-blame.sh. Signed-off-by: Junio C Hamano <gitster@pobox.com>